摘要
对张家界市1957～2003年的强降水资料(日雨量50.0～99.9 mm和日雨量≥100.0 mm)从时空分布特点和强降水出现频数进行了统计分析。结果表明:张家界历年共发生区域性暴雨102日次,区域性大暴雨及特大暴雨23日次;共出现暴雨485站次,桑植最多,慈利次之,永定最少,1980年出现暴雨次数最多(21站次);共出现大暴雨及特大暴雨104站次,慈利最多,永定次之,桑植最少,2003年出现大暴雨及特大暴雨次数最多(9站次);2月下旬至11月上旬为暴雨出现时段,暴雨峰值出现在6月下旬(61站次),旬际分布图近似成正态分布,以6月下旬为中心,两端逐渐下降;5月上旬至10月上旬为大暴雨及特大暴雨出现时间,峰值出现在6月下旬(20站次);6月中旬到7月是张家界强降水频发期,夜间(20～08时)出现暴雨概率明显大于白天。
Based on the data of heavy rain from 1957 to 2003 in Zhangjiajie, the temporal-spatial and frequency variation characteristics are analyzed. The results indicate that the regional rainfall dates with daily rainfall from 50.0 to 100.0 mm are 102 in the past 47 years, and the regional heavy rainfall dates defined as daily rainfall is more than 100.0 mm are 23 days. In the same period, rainfall have appeared 485 times in Sangzhi, Yongding and Cili three stations.There were 21 times rainfall in 1980; So did heavy rainfall 104 times, which is the most in Cili and the least in Sangzhi, and it happened 9 times in 2003; Duration from late February to November first 10 days has the rainfall possibility , the peak value of rainfall of 61 cases appears in late June; The ten-day serial curve approximately has the normal distribution with the center in the late June, Heavy rainfall begins/ ends at early May/October with the peak value of 20 times in late June; Strong precipitation frequently happened from mid-10-day June to July, the probability of rainfall at night is obviously higher than that on the day.
出处
《暴雨灾害》
2008年第2期160-165,共6页
Torrential Rain and Disasters
关键词
张家界市
强降水
时空分布
频数
日变化
Zhangjiajie city
Strong precipitation
Space and time distribution
Frequency
Daily variation
